Is motion of moon round the earth is simple harmonic motion?

OK, the Moon revolves around the Earth. Right? Right.

The Moon revolves around the Earth but that is a bit of an over simplification. Our Moon is a very large object. Indeed, the Earth-Moon "system" could be properly thought of as a "double planet system".

No other pair in the Solar System are so close in size (except for Pluto's main satellite, Charon, but they are an unusual pair for a lot of other reasons that I will not discuss at this time). The Earth's diameter almost four times the diameter of the Moon. The Earth's diameter is 12,700 kilometers and the Moon has a diameter of 3,400 kilometers.

That's a difference of about four fold. The Earth is bigger so it is the "primary" body and the Moon is its satellite, but the Moon is a very big satellite! However, size can be deceiving because it is gravity that affects orbits.

All matter has mass and all mass attracts other masses by a force called gravity. The force of gravity depends upon the mass of the two objects and the ... more.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.